摘要
基于表观弹性理论,给出了压电陶瓷晶堆处于不同位置时耦合振动换能器的设计方法.在理论推导的基础上,借助有限元软件Ansys,研究了晶片位置对换能器耦合振动特性的影响.结果表明,随着陶瓷晶堆远离换能器位移节面,有效机电耦合系数和动态电容逐渐减小,静态电容、动态电阻和动态电感增大.同时,加工了相应尺寸的换能器,对其性能参数进行了测试,理论计算和实验测量结果符合较好.
Based on the apparent elasticity theory, a design method for the transducer in coupled vibration is given when the piezoelectric ceramic elements are placed in different position of the transducer. The influence of piezoelectric ceramics position on coupled vibration of transducer is studied by employing finite element software Ansys. It is concluded that, as the piezoceramic elements are far from the displacement node of the transducer, the effective electromechanical coupling factor and the dynamic capacitance are decreased gradually. Meanwhile, the static capacitance, the dynamic resistance and the dynamic inductance are increased. The theoretical results are verified experimentally.
出处
《陕西师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第1期37-41,共5页
Journal of Shaanxi Normal University：Natural Science Edition
基金
国家自然科学基金资助项目(10674090)
关键词
表观弹性法
模态分析
谐响应分析
apparent elasticity method
modal analysis
harmonic analysis
